Q-factor Modification for Low-frequency Room Modes

Avis MR. Q-factor Modification for Low-frequency Room Modes. In: AES Conference: 21st International Conference: Architectural Acoustics and Sound Reinforcement. Audio Engineering Society; 2002. Paper 000058. Available from: https://aes.org/publications/elibrary-page/?id=11222

@inproceedings{Avis2002_11222,
  author = {Avis, Mark R.},
  title = {{Q-factor Modification for Low-frequency Room Modes}},
  booktitle = {AES Conference: 21st International Conference: Architectural Acoustics and Sound Reinforcement},
  note = {Paper 000058},
  year = {2002},
  month = jun,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=11222}
}

TY  - CPAPER
TI  - Q-factor Modification for Low-frequency Room Modes
AU  - Avis, Mark R.
T2  - AES Conference: 21st International Conference: Architectural Acoustics and Sound Reinforcement
M1  - Paper 000058
PY  - 2002
DA  - 2002/06/06
UR  - https://aes.org/publications/elibrary-page/?id=11222
PB  - Audio Engineering Society
LA  - en
AB  - Low frequency normal modes of an enclosed soundfield introduce unwanted frequency, spatial and temporal artefacts to reproduced electroacoustic signals. A novel control approach has been reported [1,2] based on an analytical modal decomposition, using a low frequency soundfield model in a one-dimensional environment formed from the sum of a number of second order IIR filter sections. In this paper, these techniques are applied to the low frequency resonances of a three dimensional test room. It is shown that significant reductions in modal Q and corresponding reductions in modal decay times may be achieved, leading to smaller low-frequency soundfield variance and decreasing audibility of time-domain modal artefacts.
ER  -